Virginia reservoir · state assessment record
Lake Manassas (Broad Run Reservoir)
The assessment record reported by Virginia to EPA under Clean Water Act sections 303(d) and 305(b), filed in the 2022 reporting cycle.
- 188
- Assessed acres
- Reservoir
- Water type
This waterbody in one line
Lake Manassas (Broad Run Reservoir), a reservoir in Virginia, was reported but not assessed in the state's most recent Integrated Report cycle (2022). By assessed acreage it sits in the upper quartile by assessed acreage nationally (38,628 lakes).
- Not Assessed
- overall status
- P80
- Assessed size nationally
Assessment verdicts are the state agency's decisions as reported to EPA ATTAINS; PlainLakes renders them without modification.
How Lake Manassas (Broad Run Reservoir) reads against the filed register
Paragraphs are selected by this unit's percentiles and use matrix: different lakes lead with different dimensions. Figures are ATTAINS / portal register arithmetic, not advice.
The signature stat: assessed size
The number that most separates Lake Manassas (Broad Run Reservoir) nationally is assessed size: 188 acres, larger than 80% of the 38,628 lake-type units with an area on file.
IR category 3 on Lake Manassas (Broad Run Reservoir)
The Integrated Report category filed for Lake Manassas (Broad Run Reservoir) is 3. PlainLakes renders EPA's code without remapping it into a consumer grade.
Overall status: Not Assessed
ATTAINS overall status on this unit is “Not Assessed”. PlainLakes does not rewrite that vocabulary into a consumer score.
According to the U.S. Environmental Protection Agency's ATTAINS program, Virginia carries 275 filed lake-type waterbodies in the August 2026 extract, and this page renders the assessment record EPA assigned to Lake Manassas (Broad Run Reservoir) without modification. See our methodology for reporting-unit limits and gauge linking rules.
The record
Designated-use assessments
Fully Supporting and Not Supporting are the state's definitive verdicts; other entries mean the use was not conclusively assessed in this cycle.
| Designated use | Group | Verdict |
|---|---|---|
| Aquatic Life | Aquatic-life or related | Not Assessed |
| Fish Consumption | Fish-consumption or fishery | Not Assessed |
| Public Water Supply | Drinking-water supply designation | Not Assessed |
| Recreation | Recreation | Not Assessed |
| Wildlife | Other | Not Assessed |
The record
Listed impairment causes
The state reported this reservoir in its 2022 Integrated Report cycle but reached no assessment determination, so no causes are listed. The unit is recorded under EPA integrated-reporting Category 3: reviewed, with insufficient information to determine whether it meets water-quality standards. An undetermined waterbody is neither confirmed clean nor confirmed impaired.
Reading the record
What Lake Manassas (Broad Run Reservoir)'s record holds
Scale and rank
Lake Manassas (Broad Run Reservoir) is one of 275 lake-type waterbodies reported to EPA from Virginia. It is not among the 193 whose reported record carries enough populated assessment or gauge data for this site to list and index it. At 188 assessed acres it ranks 7,587th by assessed size among the 38,628 lakes the dataset carries an area for, counting a state’s repeated filings of one water once, behind 7,586 lakes with a larger one.
What this record holds
Virginia filed this reservoir in its 2022 Integrated Report cycle but reached no determination, so the record holds that filing and its use rows, but no verdict, and with nothing judged, no impairment cause to track over time. The state has not yet filed a definitive fish-consumption verdict, a definitive recreation verdict, a definitive aquatic-life verdict, and 1 other for this record; those fields populate when it reports them in a future Integrated Report cycle.
Reported trophic class
Virginia carried the trophic field for this assessment unit and filed it as unclassified, which records that no class was determined rather than that the water is unenriched. What the trophic scale measures.
In context
Where Lake Manassas (Broad Run Reservoir) sits nationally
Assessed size among U.S. lakes
Distribution of assessed acreage across ATTAINS lakes filed with an area, counting a state’s repeated filings of one water once
188 Top 20% larger than 80% of 38,628 lakes
lakes the dataset carries an area for, counting a state’s repeated filings of one water once, bucketed by value
Source EPA ATTAINS · Reporting cycles 1987–2026
In both charts each bar is a band and taller bars hold more waterbodies; the dashed line and filled bar mark Lake Manassas (Broad Run Reservoir). Hover or tap any bar for its full count and share.
In context
Virginia context
ATTAINS carries 275 lake-type waterbodies in Virginia, 181 assessed as not supporting at least one use and 50 fully supporting.
| Other large assessed lakes in Virginia | Assessed acres |
|---|---|
| Kerr Reservoir Assessment unit VAW-L75L_ROA05M22 Not Supporting | 14,828 |
| Kerr Reservoir Assessment unit VAW-L75L_ROA05L98 Not Supporting | 7,018 |
| Kerr Reservoir Assessment unit VAW-L75L_ROA05N22 Not Supporting | 4,182 |
| Lake Drummond Not Supporting | 3,242 |
| Lake Chesdin Not Supporting | 3,164 |
| Lake Gaston Not Supporting | 3,072 |
Lakes near Lake Manassas (Broad Run Reservoir)'s assessed acres
Similar assessed acres
Nearest filed extents (188 acres here).
- Pratt Lake · 188 acres · MI
- Bergkeller · 188 acres · MN
- Imogene · 188 acres · MN
- Loon Lake · 188 acres · NH
What to do with this record
- Assessment verdicts are cycle-based, not real-time. For fish-consumption decisions, your state advisory program is the binding source. Consumption status guide
- Impairment listings follow the Clean Water Act 303(d) process; a listing is a regulatory finding, not a closure notice. 303(d) explained
PlainLakes renders state assessment decisions and federal gauge observations without modification. It does not issue advisories.
Assessment decisions on this page are rendered directly from state Integrated Report records in EPA's ATTAINS system; gauge figures are daily-value observations from the USGS National Water Information System, no number is typed in by an editor. Overall status, use verdicts, and causes are the state's reported decisions for assessment unit VAN-A19L_BRU04A02. Counts and percentiles are computed across all lake-type records PlainLakes ingests from ATTAINS. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-08-17. Primary sources: EPA ATTAINS and USGS National Water Information System.